Changeable advertising sign



L. THOMPSON CHANGEABLE ADVERTISING SIGN Filed Oct. 29.A 1926 IN VEN TOR. E5 THOMPSON BY MQW/www ATTORNEY Patented Oct. 9, 1928. I y

UNITED STATES PATENT oEfFl'cE.

LEE THOMPSON, OF SAN,DI`EGO, CALIFORNIA.

CHANGEABLE ADVERTISING SIGN.y

Application ined october 29, 1926. serial No; 144,937. This invention relates to improvements cabinet are the frame 1, the spindles 2 and in an automatic advertising cabinet, and 3, sprockets 4, 5, v6 and 7, chains 8 and 9, the objects of my improvements are: first, panels 10, motor 11, worm 12, worm wheel tor provide a cabinet of the class described 13, motor snpportingbracket 14, and parti-- "'5 containing a plurality of panels carrying tion`15. advertising matter on both side surfaces; The, cabinet frame 1 is substantially a second, to provide a cabinetrof the class deshallow, rectangular case, thev front and scribed having rotationally movable panels rear portionsV of which have rectangular l visible from either side of the cabinet; openings in which glassdoors 1a and l" are p '-10 third, to provide a pluralityT of rotationally fitted, either hinged, clamped kor otherwise 65 movable advertising panels 'capabley of carsecured, permitting their vbeing readily rying advertising cards vorA having notices opened or removed. r.The spindle 2 is vrowrittenl directly on their surfaces; fourth, tatably supported in bearings 2l 'and 2 to provide `a cabinet kof the class described .suitably secured to the lower ends of the which is economical of space, simple and frame sides 1 and 1c1 ofthe frameil, and 7n rugged in construction and reliable in opso positioned that the spindle 2 lies midway eration; fifth, to provide a cabinet of the between' the 'glass doors 1a and 1b. Y The class described in which the individual panbearing 2a is mounted on the exterior of the els are readily accessible and removable, and frame side 1", the spindle` 2 extending 1 Y tin 20 si'Xth, to provide a cabinet Vof the class dethrough 'the bearing2a and carrying on said '.75

scribed in which any objectionable vflicker extension a worm wheel 13 suitably se y caused by oppositely moving panel groupsv cured to thespindle 2. The worm wheel 13 is eliminated. is driven 'by means of the worm 12 mounted With these and other objects in view, 'as on the shaft 11a of the motor 11. Sprockets will appear hereinafter, my invention con 4and 5 are mounted on and secured to the 80 sists of certain novel features of construcspindle 2 on either side within the frame. tion, combination and arrangement of parts The spindle 3 is rotatably mounted at the and portions, as will be hereinafter de- .upper end ofthe frame 1, in bearings 3'd scribed in detail and'particularly'set forth and 3b, so positioned that thespindle 3 lies in the appended claims, reference being had parallel to and vertically above the spin- S5;

to gthe accompanying'drawings and to the dle 2. A- pair ofk sprockets 6 and V7 are v characters of reference thereon, which form secured to the spindle 3 in vertical alinea part of this application, in which: i ment with'the sprockets 4 and 5, respec- Figure 1 is a front view, showing the tively.v A pair of endless ychains 8 and19` cabinet in section,=viewedin.the direction run overthese sprockets, the chain 8 co- 90 0f the alTOWS 2%2 Of Fg- 2, and ShOWIlgA operating with the sprockets 4 and 6, and fragmentary views ofthe chain and a num 'the chain 9 with-the sprockets 5 and 7 In ber of the upper panels; Fig. 2 '1S a Side this manner the `chainsr and.9 are movable view in section viewed in the direction Of in planes parallel and adjacent to the frame the arrows 1-1 of Fig. 1; Fig. 3 is an enends, 1c andA 1d, respectively. As all four 95 larged fragmentary detailed elevation `of sprockets are of equal size, the chains willy one of the panels, showing an advertising move at a uniform rate of speed when the card in place; Fig. 4 is an end view of the spindle 2 vis rotated, panel with a card inserted on one side; Fig'. The chains 8 and 9 are provided with 5 is a further fragmentary elevation of the triangular' shaped. lugs 1 6 having perfora- 100 i panel, showing the black writing surface tions 16a. TheseV lugs may form part of and a fragmentary view of the chainl with the chain link, as more clearly illustratedthe supporting lug for the panel, andV Fig. in Figs. 5 and'. VThey are placed at suit- 6 is an enlarged detailedside elevation of able intervals on one side of each chain.

C, showing the rmethodv, of Then assembling the latter in position on 105 a supporting lug securing to the chain. their sprockets, they are so arranged that Like characters of reference refer .to simithe lugs 16 form pairs in horizontal* aline'. lar parts and portions throughout the sev ment, nas geen in Fig.V 1. vA plurality of eral views of the drawings elongated rectangular panels 10, of any The principal parts of my advertising suitable material, are provided with studs 1,10

a at their ends, as shown in Figs. 3, 4 and 5. These panels are suspended between the chains S and 9, the studs 10aL extending provided to prevent lateral displacement of the panels 10. `An opaque partition 15, occupying a central position between the series of panels, is secured to the frame ends lc and 11 in any suitable manner. y

The panels 10 are provided with mat block surfaces 10d, suitable for Writing on with chalk or other material, and further with channels, formed by bent strips 10c, secured to their edges, as illustrated in Figs.

3 and 4l. The channels allow cards 17 to be slipped on and held in position on either panel surface, if desired.`

In operation the pair of chains supporting the panels, which carry advertisements on both surfaces,l either written thereon or on cards supported thereby, are caused to move uniformly vertically across both windows in the cabinet doors. While one side' of a number of the panels is visible through one window, the reverse side of a number of the remaining panelsis visible through the other window. Thus, the cabinet presents to view sequentially, both sides of the panels moving therein. `In this manner the greatest possible advertising display is obtained.

The use of. a worm drive from motor shaft to sprocket spindle enables the movement of the chains to be held at a suitablelow rate of speed, while permitting the use of a.- reasonably high speed motor.

The centrally located partition 15 obviates the disturbing effect that. would otherwise be caused by the oppositely moving panel groups and the objectionable flicker of light resulting therefrom.

.The simple, flexible suspension allows of quick removal and replacement of panels, which is an essential `feature of this class of advertising cabinet. s

Though I have shown and described a particular construction, combination and arrangement of parts and portions, I do not wish to be limited to this particular construction, combination and arrangement, but desire to include inthe scope of my invention, the construction, combination and arrangement substantially as set forth in the appended claims.

Havingv thus described myv invention, what I claim as new and desire to vsecure by Letters Patent is:

l. In a unit member of a plurality of panels forming a movable group in Aan Vadvertising cabinet, two blackboard faced display surfaces, channel members rsecured to the margins thereof, forming grooves for supportineone or more independent display members `over said blackboard surfaces and studs projecting from each end of said panel for pivotally suspending same.

2. In an advertising cabinet of the class described, a pair of endless chains provided at spaced intervals with rlinks having perforated projections,k a plurality of panels having twovvblackboard faced display surfaces, relatively alined studs projecting fromeachend of said panels and journaled in said perforated links, `channel members provided on the margin of said panels for supporting 'independent display cards, and means for simultaneously moving the endless chains and displaying successively ope posite surfacesv of said panels.

3. In a unit panel memberv ofa plurality of movable panels in an advertising cabinet, two blackboard-faced display surfaces, and a pair lof U-shaped channel members sef cured to 4and enveloping` the upper and lower edges ofsaid panel member and forming with the surfaces thereof-grooves for supporting fone or, more independent display members over said blackboard surfaces.

In testimony whereof, I have hereunto set my hand at VSan Diego, California, this 22nd day ofOctober, 1926. .Y ,l

' LEE THOMPSON. s 

